The workout du jour is high-intensity interval training, and this is one format that might be here to stay. It requires only a few minutes of (really) hard work to cover all the major muscle groups.
HIIT, as it’s called, alternates short periods of all-out activity with even briefer breaks. Just how short is short? Typically 20 to 30 seconds of work followed by 10 seconds of recovery — spiking metabolism and tricking your body into thinking it rested.
HIIT, as it’s called, alternates short periods of all-out activity with even briefer breaks. Just how short is short? Typically 20 to 30 seconds of work followed by 10 seconds of recovery — spiking metabolism and tricking your body into thinking it rested.